title: 24-hour ambulatory study of duodenal pH.
authors.forename: D
authors.initials: D
authors.lastname: Kerrigan
authors.forename: N
authors.initials: N
authors.lastname: Bird
authors.forename: A
authors.initials: A
authors.lastname: Johnson
mesh_terms: D004381:Duodenal Ulcer / Q000378:metabolism*; D004566:Electrodes; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008991:Monitoring, Physiologic / Q000295:instrumentation / Q000379:methods